Weapons for Syria from Iran, Really? How come?

There is news that Iran has given Syria new advanced radars which will not be possible for the Israeli air force to go undetected over Syria if and when they want to strike the Iranian Nuclear facilities. Now here is my question, if we say that the sanctions are working and most of the advanced countries companies are out of Iran, how come Iran is developing these radars and how is it possible that with the U.S. forces in the Persian Gulf and in Iraq and Afghanistan, they (the Iranians) were able to deliver it to Syria without being detected or being intercepted by the U.S. forces.

There is really something wrong with this picture. We think of Iran as being a developing country and in trouble with its own people and their economy is in shambles and all the negative news that our intelligence agencies keep on churning out. But if the above news is true then we should take all the negative news with a grain of salt. We should be thinking of Iran then as a country which is capable of developing weapons to defend it. You know the sanctions really do not work in my opinion (case in point Pakistan which developed its nuclear arsenal when the sanctions were in place). When you are determined and desperate about something, you will do whatever it takes to get it or develop it yourself. And this is what is happening in Iran. A developing country with an educated and proud workforce, forced into a corner with sanctions, doing whatever it can to stay one step ahead of defending itself. If what is really been confirmed that it has indeed given radar to Syria ( the news does not say if it is Iranian made or Iranian bought) then it shows that the failure of sanctions and back to the drawing board for the American and Israeli government and Intelligence and Military.